
json_enter = {"a":"aa", "b":['{"c":"cc","d":"dd"}',{"f":{"e":"ee"}}]}

dic = dict()
dic['a'] = json_enter["a"]
dic['c'] = eval(json_enter["b"][0])["c"]
dic['d'] = eval(json_enter["b"][0])["d"]
dic['e'] = json_enter["b"][1]["f"]["e"]

print(dic)